‘No Pants’ rail rides around the world

January 12, 2014 |By JAKE ELLISON

What started as a prank in New York by the group Improv Everywhere has grown into an international celebration of silliness

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Participants of the No Pants Subway Ride wait for a train on January 12, 2014 in Berlin, Germany. The annual event, in which participants board a subway car in January while not wearing any pants while behaving as though they do not know each other, began as a joke by the public prank group Improv Everywhere in New York City and has since spread around the world, with enthusiasts in around 60 cities and 29 countries across the globe, according to the organization's site.

Adam Berry/Getty Images

42of60

Participants of the No Pants Subway Ride wait for a train on January 12, 2014 in Berlin, Germany. The annual event, in which participants board a subway car in January while not wearing any pants while behaving as though they do not know each other, began as a joke by the public prank group Improv Everywhere in New York City and has since spread around the world, with enthusiasts in around 60 cities and 29 countries across the globe, according to the organization's site.